GINGWAY'S STORE
CROW CREEK INDIAN RESERVATION
FORT THOMPSON, SOUTH DAKOTA
Fort Thompson
March 2009
ACCOMPLISHMENTS
• Installed 7 MWs
• Ground-water monitoring
• Issued NFA letter
• Abandoned all project wells
• Well closure documents submitted to SDDENR
EPA Region 8 performed this work in partnership with the Crow Creek
Sioux Tribe and with contract support from Avanti Corporation.
PLANNED ACTIVITIES/
FUTURE STRATEGIES
None. The EPA Region 8 UST Program has closed the site.
SITE HISTORY
Gingway's Store used two underground storage tanks (USTs) installed in
1970. The USTs had a capacity of 500 and 1,000 gallons and were used
to store gasoline. The USTs were removed in 1999. A release had been
documented at the site, but the source of release was not determined by
the tank removal as there were no holes in either tank. Approximately
50 in-place cubic yards and 70 loose cubic yards of contaminated soil
were removed from the site.
In 2002, EPA determined that the site was eligible for federal LUST
funding. In 2004, seven monitoring wells were installed and indicated
low levels of petroleum hydrocarbons. EPA implemented quarterly
groundwater monitoring and sampling that same year. After four quar-
ters of contaminant concentrations below maximum contaminant levels
(MCLs), EPA issued a "No Further Action" (NFA) letter in 2006. All
seven monitoring wells (MWs) were abandoned in 2007.
TIMELINE
r
Federal LUST Funding
eligibility determination
r
7 MWs abandoned •
Site closure
1970 > 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
L
2 USTs installed
2 USTs removed * Petroleum •
Contaminated Soils (PCS)
removed
7 MWs installed •
Nov. 2004-Nov. 2005—
Quarterly groundwater
monitoring
L
"No Further
Action" letter
issued by EPA
GINGWAY'S STORE LUST SITE
EPA Region 8 UST Program Technical Contact | Mr. Raymond Faliskie | (303) 312-6124 orfaliskie.raymond@epa.gov | www.epa.gov/region8/ust/
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